diff --git a/tests/run-tests.cts b/tests/run-tests.cts
index e63e64d8..5b92a2ff 100644
--- a/tests/run-tests.cts
+++ b/tests/run-tests.cts
@@ -13,7 +13,6 @@ import { Server } from 'http'
 import Analyser, { AnalysisResult } from '../src/analyser.cjs'
 import commandLineArgs from 'command-line-args'
 import { initPerformance } from '../src/performance.cjs'
-const Diff = require('Diff')
 
 let extended = false